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https://github.com/c64scene-ar/llvm-6502.git
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97c7fc351e
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25645 91177308-0d34-0410-b5e6-96231b3b80d8
103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
//===-- X86Subtarget.cpp - X86 Subtarget Information ------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Nate Begeman and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the X86 specific subclass of TargetSubtarget.
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//
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//===----------------------------------------------------------------------===//
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#include "X86Subtarget.h"
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#include "llvm/Module.h"
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#include "X86GenSubtarget.inc"
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using namespace llvm;
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#if defined(__APPLE__)
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#include <mach/mach.h>
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#include <mach/mach_host.h>
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#include <mach/host_info.h>
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#include <mach/machine.h>
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/// GetCurrentX86CPU - Returns the current CPUs features.
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static const char *GetCurrentX86CPU() {
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host_basic_info_data_t hostInfo;
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mach_msg_type_number_t infoCount;
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infoCount = HOST_BASIC_INFO_COUNT;
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host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t)&hostInfo,
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&infoCount);
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if (hostInfo.cpu_type != CPU_TYPE_I386) return "generic";
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switch(hostInfo.cpu_subtype) {
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case CPU_SUBTYPE_386: return "i386";
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case CPU_SUBTYPE_486:
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case CPU_SUBTYPE_486SX: return "i486";
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case CPU_SUBTYPE_PENT: return "pentium";
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case CPU_SUBTYPE_PENTPRO: return "pentiumpro";
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case CPU_SUBTYPE_PENTII_M3: return "pentium2";
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case CPU_SUBTYPE_PENTII_M5: return "pentium2";
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case CPU_SUBTYPE_CELERON:
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case CPU_SUBTYPE_CELERON_MOBILE: return "celeron";
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case CPU_SUBTYPE_PENTIUM_3: return "pentium3";
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case CPU_SUBTYPE_PENTIUM_3_M: return "pentium3m";
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case CPU_SUBTYPE_PENTIUM_3_XEON: return "pentium3"; // FIXME: not sure.
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case CPU_SUBTYPE_PENTIUM_M: return "pentium-m";
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case CPU_SUBTYPE_PENTIUM_4: return "pentium4";
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case CPU_SUBTYPE_PENTIUM_4_M: return "pentium4m";
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// FIXME: prescott, yonah? Check CPU_THREADTYPE_INTEL_HTT?
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case CPU_SUBTYPE_XEON:
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case CPU_SUBTYPE_XEON_MP: return "nocona";
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default: ;
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}
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return "generic";
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}
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#endif
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X86Subtarget::X86Subtarget(const Module &M, const std::string &FS)
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: stackAlignment(8), indirectExternAndWeakGlobals(false) {
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// Determine default and user specified characteristics
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std::string CPU = "generic";
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#if defined(__APPLE__)
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CPU = GetCurrentX86CPU();
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#endif
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// Parse features string.
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ParseSubtargetFeatures(FS, CPU);
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// Default to ELF unless otherwise specified.
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TargetType = isELF;
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// Set the boolean corresponding to the current target triple, or the default
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// if one cannot be determined, to true.
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const std::string& TT = M.getTargetTriple();
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if (TT.length() > 5) {
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if (TT.find("cygwin") != std::string::npos ||
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TT.find("mingw") != std::string::npos)
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TargetType = isCygwin;
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else if (TT.find("darwin") != std::string::npos)
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TargetType = isDarwin;
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else if (TT.find("win32") != std::string::npos)
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TargetType = isWindows;
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} else if (TT.empty()) {
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#if defined(__CYGWIN__) || defined(__MINGW32__)
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TargetType = isCygwin;
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#elif defined(__APPLE__)
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TargetType = isDarwin;
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#elif defined(_WIN32)
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TargetType = isWindows;
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#endif
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}
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if (TargetType == isDarwin) {
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stackAlignment = 16;
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indirectExternAndWeakGlobals = true;
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}
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}
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